<template>
  <!-- 设备批量导入对话框 -->
  <el-dialog :title="title" :visible.sync="open" width="400px" append-to-body>
    <el-upload
      ref="upload"
      :limit="1"
      accept=".xlsx, .xls"
      :headers="headers"
      :action="url + '?updateSupport=' + updateSupport"
      :disabled="isUploading"
      :on-progress="handleFileUploadProgress"
      :on-success="handleFileSuccess"
      :auto-upload="false"
      drag
    >
      <i class="el-icon-upload"></i>
      <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
      <div class="el-upload__tip text-center" slot="tip">
        <div class="el-upload__tip" slot="tip">
          <el-checkbox v-model="updateSupport"/>
          是否更新已经存在的设备数据
        </div>
        <span>仅允许导入xls、xlsx格式文件。</span>
        <el-link
          type="primary"
          :underline="false"
          style="font-size:12px;vertical-align: baseline;"
          @click="importTemplate"
        >下载模板
        </el-link>
      </div>
    </el-upload>
    <div slot="footer" class="dialog-footer">
      <el-button type="primary" @click="submitFileForm">确 定</el-button>
      <el-button @click="open = false">取 消</el-button>
    </div>
  </el-dialog>
</template>

<script>
import { getToken } from '@/utils/auth'

export default {
  name: 'DeviceImport',
  dicts: [],
  data() {
    return {
      // 是否显示弹出层（设备导入）
      open: false,
      // 弹出层标题（设备导入）
      title: '',
      // 是否禁用上传
      isUploading: false,
      // 是否更新已经存在的设备数据
      updateSupport: 0,
      // 设置上传的请求头部
      headers: { Authorization: 'Bearer ' + getToken() },
      // 上传的地址
      url: process.env.VUE_APP_BASE_API + '/iot/device/import'
    }
  },
  watch: {
    open(visible) {
      if (!visible) {
        this.updateSupport = 0
      }
    }
  },
  methods: {
    /** 导入按钮操作 */
    handleImport() {
      this.title = '设备导入'
      this.open = true
    },
    /** 下载模板操作 */
    importTemplate() {
      this.download('iot/device/import/template', {}, `device_template_${new Date().getTime()}.xlsx`)
    },
    // 文件上传中处理
    handleFileUploadProgress(event, file, fileList) {
      this.isUploading = true
    },
    // 文件上传成功处理
    handleFileSuccess(response, file, fileList) {
      this.open = false
      this.isUploading = false
      this.$refs.upload.clearFiles()
      this.$alert(`<div style="overflow: auto;overflow-x: hidden;max-height: 70vh;padding: 10px 20px 0;">${response.msg}</div>`, '导入结果', { dangerouslyUseHTMLString: true })
      this.$emit('update')
    },
    // 提交上传文件
    submitFileForm() {
      this.$refs.upload.submit()
    }
  }
}
</script>
